Intermediate grade gasoline The term 'Intermediate grade gasoline' as it applies to the area of energy can be defined as ' A grade of unleaded gasoline with an octane rating intermediate between 'regular'and 'premium.' Octane boosters are added to gasolines to control engine pre-ignition or 'knocking' by slowing combustion rates'.

About the author

Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English".